compiler: move NonConstGlobals pass to transform package

compiler/compiler.go

@@ -2585,17 +2585,6 @@ func (c *Compiler) Verify() error {
 	return llvm.VerifyModule(c.mod, llvm.PrintMessageAction)
 }
 
-// Turn all global constants into global variables. This works around a
-// limitation on Harvard architectures (e.g. AVR), where constant and
-// non-constant pointers point to a different address space.
-func (c *Compiler) NonConstGlobals() {
-	global := c.mod.FirstGlobal()
-	for !global.IsNil() {
-		global.SetGlobalConstant(false)
-		global = llvm.NextGlobal(global)
-	}
-}
-
 // Emit object file (.o).
 func (c *Compiler) EmitObject(path string) error {
 	llvmBuf, err := c.machine.EmitToMemoryBuffer(c.mod, llvm.ObjectFile)